Rotary engine.



v No. 883,605.

PATENTED MAR. a1, 1908. I A. E. ABBOTT.

ROTARY ENGINE.

APPLICATION FILED OCT. 3. 1907. 4 SHEETB SKBBT L WITNESSES INVENTOH W15: By

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No. 883.605. P'ATENTED MAR. 31, 1908.

A. E. ABBOTT. ROTARY ENGINE.

APPLICATION FILED OGT. 3.1907.

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N. as- .05. 8 A. E. AB ROTARY E APPLIOATIOI UNITED STATES PATENT OFFICE.

ROTARY ENGINE.

Specification of Letters Patent.

Application filed October 3, 1907.

Patented March 31, 1908.

Serial No. 395,664.

To all whom it may concern:

Be it known that I, AMBROSE EDGAR AB- BOTT, a citizen of the UnitedStates, and a resident of Rhyolite, in the county of Nye and State ofNevada, have invented a new and Improved Rotary Engine, of which thefollowing is a full, clear, and exact description.

The object of the invention is to provide a new and improved rotaryengine which is simple and durable in construction, very effective inoperation, easily and quickly reversed, and arranged to utilize themotive agent to the fullest advantage.

The invention consists of novel features and parts and combinations ofthe same, which will be more fully described. hereinafter and thenpointed out in the claims.

A practical embodiment of'the invention is represented in theaccompanying drawings forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a reduced end elevation of the improvement; Fig. 2 is alongitudinal central section of the same on the line 22 of Fig. 1; Fig.3 is a cross section of the same on the line 3-'3 of Fig. 2 Fig. 4 is aplan view of the same, part of the steam chest containing the reversingvalves being shown in section; Fig. 5 is a like view of the same showingthe valves in a difierent position; Fig. 6 is a plan view of the pistonhead; and Fig. 7 is an inverted plan view of the steam chest containingthe reversing valves.

In the cylinder A is eccentrioally mounted the piston or rotator Bsecured on a shaft C journaled in suitable bearings in the heads of thecylinder A and carrying at its outer ends pulleys or fly wheels C fortransmitting the rotary motion of the piston B to other machinery. Inthe piston B is mounted to slide diametrically the piston head Dprovided at its ends with rollers E, E in contact with the innerperipheral surface of the cylinder A at opposite points thereof, asplainly indicated in Fig; 3. The cylindrical piston B is in contact withthe inner surface of the cylinder A at one point thereof, preferably atthe top, as shown in Fig. 3, and into the said cylinder A at oppositesides of the said contacting point are arranged a set of admission ortsa and b, and a set of exhaust ports c and d, the ports in each set beingdisposed crosswise one to the other, as plainly indicated in Figs. 4and5. The ports a, b, c, and (1 open into a compartment F formed in thesteam chest F, and connected by a steam admission cross channel F with acut-off valve G connected with the supply pipe H leading to a boiler orother source of motive agent supply, the said admission cross channelhaving its terminals directly above the ports a and b. The compartment Fis also connected by an exhaust cross channel F with an exhaust pipe Ito conduct the exhaust motive agent to a suitable place of discharge.The terminals of the exhaust cross channel F are direotl above theexhaust ports 0, d.

In the compartment F, and over the ports a, c and b, d, are mounted toslide the slide valves J and J having ports 6, f and g, 72., re-

spectively, of which the ports e, f are in reg1s ter with the ports aand c and the ports g, h are closed and out of register with the portsb, d at the time the engine is moving forward in the direction of thearrow a (see Figs. 3 and 4) and when the engine is to run in the reversedirection the valves J and J are moved to the position shown in Fig. 5so that the ports g, h are in register with the ports I), d while theports a, c are closed and out of register with the ports 6, The valvestems J and J of the slide valves J and J are connected with each otherat their outer ends by a spring K, and between the angular ends J, J ofthe stems J J extends a lever L under the control of the operator, forshifting the positions of the valves J and J for forward movement or areversing of the engine, as above described.

The lever L is adapted to be locked to the usual notched segment N by acatch 0 controlled by a lever O on the hand lever L, so as to lock thevalves J and J in either of the desired positions, that is, either in aforward or reversing position, as indicated in Figs. 4 and 5.

The cut-off valve G is preferably in the form of a rocking valve,adapted to be rocked from the main shaft C, the latter being for thispurpose provided with a gear wheel P in mesh with a pinion P having awrist pin P connected by a pitman Q with a sleeve R adjustably securedby a set screw R to an arm R mounted to swing loosely on the valve stemG of the out-off valve G.

On the sleeve R is pivoted a hook S for engaging an arm T secured to thevalve stem G and pressed on by a spring T to normally hold the arm Tagainst a stop T When the engine is running the pinion P which acts as acrank arm imparts by the pitman Q a swinging motion to the arm R whichby the hook S imparts a downward swinging motion to the arm T so thatthe valve G is rocked into open position to connect the supply pipe Hwith the admission cross channel I, the spring T returning the arm T onthe return or upward movement of the arm R By adjusting the sleeve R onthe arm R the valve G can be opened sooner or later and for a greater orshorter length of time. It is understood that the pinion makes tworevolutions to each revolution of the gear wheel-P to admit steam twiceto the channel F for each revolution of the piston B. Now by thearrangement described the rock valve G is rocked to cut off the steam atthe desired point and thus allow using the steam expansively.

When the parts are in the several positions illustrated in Figs. 2, 3and 4, then the live motive agent admitted to the admission crosschannel F passes by way of the registering ports 6 and a into thecylinder A, to turn the iston B in the direction of the arrow at. Theexhaust of the motive agent now takes place from the cylinder A by wayof the registering ports 0 and f conducting the exhaust steam into theexhaust cross channel F from which the exhaust steam can pass by way ofthe ex haust pipe Ito a suitable place of discharge.

Now when it is desired to reverse the engine, then the operator swingsthe hand lever L over to the right, so that the lever L engages theangular arm J thus shifting the valve J from the left to the right andwith it the other valve J, owing to the spring K connecting the twovalve stems J J with each other, the said valves then assuming theposition illustrated in Fig. 5. When this takes place the motive agentnow passes from the admission cross channel F by way of the registeringports g and 7) into' the cylinder A at the right hand side thereof, soas to turn the piston B in the inverse direction of the arrow at. Theexhaust motive agent now passes out of the cylinder A by way of theregistering ports d, h conducting the exhaust into the exhaust crosschannel F from which the exhaust can pass by way of the exhaust pipe Iinto a suitable place of discharge.

The improved rotary engine shown and described is comparatively simple,and composed of few parts, not liable easily to get out of order.

By the simple valve arrangement shown and described, the engine can bequickly and conveniently reversed whenever it is desired to do so.

Having thus described my invention, I claim as new and desire to secureby Letters- Patent:

1. A rotary engine comprising a cylinder, a rotatable piston in thecylinder, a steam chest, reversible slide valves in the steam chest andcontrolling the inlet, and exhaust of the motive engine to and from thecylin-' der, a hand lever for engaging the valvestems of the said slidevalves and a spring. for connecting the said valve stems with eachother.

2. A rotary engine comprising a cylinder having sets of admission portsand sets of exhaust ports, a rotatable piston in the cylinder, a steamchest having a live steam cross channel and an exhaust cross channel,and manually controlled slide valves in the said steam chest andcontrolling the said sets of ports and channels.

3. A rotary engine comprising a cylinder, a main shaft, a piston on thesaid shaft and eccentrically mounted in the said cylinder and in contactwith the inner surface of the cylinder at one point, the said pistonhaving a sliding piston head in contact at both ends with the interiorof the cylinder at opposite points, a steam chest, reversible slidevalves in the said steam chest and controlling the inlet and exhaust ofthe motive agent to and from the cylinder, means for shifting the slidevalves, one for forward travel and the other for reversing, a rock valvefor controlling the admission of the motive agent to the said steamchest, and means actuated from the said main shaft for rocking the saidrock valve.

4. A rotary engine comprising a cylinder,

a main shaft, a piston on the said shaft and eccentrically mounted inthe said cylinder and in contact with the inner surface of the cylinderat one point, the said piston having a sliding piston head in contact atboth ends with the interior of the cylinder at opposite points, a steamchest, reversible slide valves in the said steam chest and controllingthe inlet and exhaust of the motive agent to and from the cylinder, ahand lever for engaging the valve stems of the said slide valves, and aspring for connecting the said valve stems with each other.

5. A rotary engine comprising a cylinder having sets of admission portsand sets of ex haust ports, a piston eccentrically mounted in the saidcylinder and having a sliding piston head, the said piston being incontact with the inner surface of the cylinder at a point between theports of the said sets of ports, a steam chest having a live steam crosschannel and an exhaust cross channel, and manually controlled slidevalves in the said steam chest and controlling the said sets of portsand channels.

6. A rotary engine comprising a cylinder having sets of admission portsand sets of exhaust ports, a piston eccentrically mounted in the saidcylinder and having a sliding piston head, the said piston being incontact with the inner surface of the cylinder at a point between theports of the said sets of ports, a steam chest having a live steam crosschannel and an exhaust steam cross name to this specification in thepresence of channel, manually controlled shde valves 1n two subscribingwitnesses.

the said steam chest and controlling the said sets of ports andchannels, and a cut-off valve AMBROSE EDGAR ABBOTT 5 for controlling theadmission of the steam to Witnesses:

the said live steam compartment. R. A. ABBOTT,

In testimony whereof I have signed my D. ALLEN.

